question: Given the fact "runoff contains pesticides from cropland", what is the answer to "A lake is unsafe for swimming because it is a bit below some farmlands that use"

answer: pesticides


question: Given the fact "some humans live in houses", what is the answer to "some humans live in"

answer: constructed environment repellents


question: Given the fact "water flows down a slope", what is the answer to "Gravity effects water most when it is"

answer: on a curved surface


question: Given the fact "chemical splashing sometimes occurs during experiments", what is the answer to "Which can happen during an experiment that might be dangerous?"

answer:
lemon juice splashing